Lexus NX250 (2022 year). Manual in english - page 24

Supporting safe exit by detecting detectable objects at the rear of
the vehicle by outputting sounds, displaying screens as a warning or
cancelling opening of the doors

The Safe exit assist (with door opening control) is a system that uses radar sensors
installed on the inner side of the rear bumper to help occupants judge if an
approaching vehicle or bicycle may collide with a door when opening it or cancel
opening of a door, to reduce the possibility of a collision.

WARNING

■

Cautions regarding the use of the system

●

The driver is solely responsible for safe driving. Always drive safely, taking care to
observe your surroundings.

●

Safe exit assist is a supplementary system that, when the vehicle is stopped, informs
occupants of the existence of approaching vehicles and bicycles. As this system alone
cannot used to judge safety, over-reliance on this system may lead to an accident
resulting in death or serious injury.
As the system may not function correctly under certain conditions, the driver’s own
visual confirmation of safety is necessary.

 Related Links 

Customizable features(P. 703)

Purpose of the Safe exit assist

INFORMATION

■

Conditions under which the system will not detect a vehicle

●

Safe exit assist does not detect the following objects, vehicles, and bicycles:

•

Vehicles or bicycles which are approaching slowly

•

Vehicles or bicycles which are determined to have a low possibility of colliding with
a door (other than the back door) when opened

•

Vehicles or bicycles which are approaching from directly behind

•

Vehicles or bicycles which are approaching from the front

•

Guardrails, walls, signs, parked vehicles, and other stationary objects

•

Animals, etc.

●

In situations such as the following, safe exit assist will not operate:

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•

When 3 minutes or more have elapsed since the engine off (the time which
operation is possible may be extended if a door is opened and closed)

•

When your vehicle is not completely stopped

System components

A

Center display

Turning the safe exit assist on/off. When opening of a door is canceled, the driver is
informed through voice guidance that the system has operated.

B

Multi-information display/Head-up display

*

/Buzzer

If collision with a door is likely and opening of the door is canceled, the door will
be displayed on the multi-information display and head-up display. Also, if a door is
opened when an outside rear view mirror indicator is illuminated, a buzzer will sound
as a warning.

C

Outside rear view mirror indicators

When a vehicle or bicycle which may collide with a door (other than the back door)
when opened is detected, the outside rear view mirror indicator on the detected side
will illuminate. If the door on the detected side is open, or opening of the door is
canceled, the outside rear view mirror indicator will blink.

D

Door opener switch (manual release handle)

If a door opener switch is operated to open a door while the outside rear view mirror
indicator on that side is illuminated, opening of the door will be canceled.

INFORMATION

■

Outside rear view mirror indicator visibility

In strong sunlight, the outside rear view mirror indicator may be difficult to see.

■

Buzzer

If the volume setting of the audio system is high or the surrounding area is loud, it may be
difficult to hear the buzzer.

* : 

If equipped

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■

Voice notifications

In the following situations, voice notifications will not be output:

●

After opening a door and entering the vehicle, until the engine is started

●

When 3 minutes or more have elapsed since the engine was stopped

●

When the language setting of the center display has been set to a language that does
not support voice notifications

●

When all of the doors have been locked from outside the vehicle

●

When a door remains open for 1 minute or more after the engine is stopped

●

When ACC mode has been enabled through a customize setting on the center
display and the engine has been stopped

●

When the parking assist volume setting on the center display has been set to off

WARNING

■

To ensure the system can operate properly

Safe exit assist sensors are installed behind the left and right sides of the rear bumper
respectively. Observe the following to ensure the safe exit assist can operate correctly.

●

Keep the sensors and the surrounding areas on the rear bumper clean at all times.
If a sensor or its surrounding area on the rear bumper is dirty or covered with snow,
the Safe Exit Assist may not operate and a warning message will be displayed. In this
situation, clear off the dirt or snow and drive the vehicle with the operation conditions
of the SEA function satisfied for approximately 10 minutes. If the warning message
does not disappear, have the vehicle inspected by your Lexus dealer.

●

Do not attach accessories, stickers (including transparent stickers), aluminum tape,
etc., to a sensor or its surrounding area on the rear bumper.

●

Do not subject a sensor or its surrounding area on the rear bumper to a strong impact.
If a sensor is moved even slightly off position, the system may malfunction and vehicles
may not be detected correctly. In the following situations, have your vehicle inspected
by your Lexus dealer.

•

A sensor or its surrounding area is subject to a strong impact.

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WARNING

•

If the surrounding area of a sensor is scratched or dented, or part of them has
become disconnected.

●

Do not disassemble the sensor.

●

Do not modify the sensor or surrounding area on the rear bumper.

●

If a sensor or the rear bumper needs to be removed/installed or replaced, contact
your Lexus dealer.

●

Do not paint the rear bumper any color other than an official Lexus color.

Vehicles that can be detected by the Safe exit assist

When the safe exit assist detects the following vehicles or bicycles using a rear side
radar sensor, the occupants of the vehicle are informed through an outside rear
view mirror indicator, buzzer, display on the meter, display on the head up display,
and voice notification.

A

A Vehicle or bicycle which has a high possibility of colliding with a door (other
than the back door) when opened

The Safe exit assist detection areas

The areas that vehicles can be detected in are outlined below.

A

Approximately 145 ft. (45 m) rearward from the front door

*1

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Turning the Safe exit assist system ON/OFF

The Safe exit assist system can be changed between ON and OFF on the center
display

1

Select 

 .

2

Select [Driving assist] .

3

Select [Safe exit assist] .

When the Safe exit assist function is disabled, the driving assist infomation indicator
illuminates.
Each time the engine switch is turned off then changed to ON, the Safe exit assist
will be enabled automatically.

INFORMATION

■

The Safe exit assist is operational when

The Safe exit assist is operational when all of the following conditions are met:

●

When the engine switch is ON, less than 3 minutes have elapsed since the engine was
off, or less than 3 minutes have elapsed since a door was opened and someone has
entered the vehicle (the time which operation is possible may be extended if a door is
opened and closed)

●

Safe exit assist is on

●

The vehicle is stopped.

●

The shift position is in a position other than R.

■

The Safe exit assist will detect a vehicle when

The Safe exit assist will detect a vehicle present in the detection area in the following
situations:
When the vehicle is stopped and a vehicle or bicycle, which is traveling parallel to the
vehicle, is approaching within the area that a door opens (other than the back door)

■

Opening the doors when opening is canceled by the system

Perform the following operation to open a door.
After the approaching vehicle or bicycle passes or changes direction, check the sur-
rounding area and press the door opener switch again.

●

Press and hold an inside door opener switch for approximately 3 seconds or more

→

 P.401

●

Press an inside door opener switch quickly 3 times or more

*1 : 

The faster a vehicle or bicycle is approaching, the distance at which an outside rear

view mirror indicator will illuminate or blink will become further.

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●

Pull a manual release handle

■

Conditions under which the system may not function correctly

●

The Safe exit assist may not detect vehicles correctly in the following situations:

•

When the sensor is misaligned due to a strong impact to the sensor or its surround-
ing area

•

When mud, snow, ice, a sticker, etc., is covering the sensor or surrounding area on
the rear bumper

•

When driving on a road surface that is wet with standing water during bad weather,
such as heavy rain, snow, or fog

•

When a vehicle or bicycle approaches from behind a nearby parked vehicle

•

When an approaching vehicle or bicycle suddenly changes direction

•

Immediately after a vehicle or bicycle starts moving

•

When the back door is open

•

When a bicycle carrier, ramp, or other accessory is installed to the back of the
vehicle

•

When a parked vehicle, wall, sign, person or other stationary object is behind the
vehicle

•

When the vehicle is stopped at an angle to the road

•

When a vehicle is traveling near an approaching vehicle or bicycle

•

When an approaching vehicle or bicycle is traveling along a stationary object, such
a wall or sign

•

When a vehicle or bicycle is approaching at high speed

•

When towing with the vehicle

•

When stopped on a steep slope

•

When stopped on a curve or at the exit of a curve

●

Instances of the Safe exit assist unnecessarily detecting a vehicle and/or object may
increase in the following situations:

•

When the sensor is misaligned due to a strong impact to the sensor or its surround-
ing area

•

When a vehicle or bicycle approaches from behind your vehicle at an angle

•

When the vehicle is stopped at an angle to the road

•

When a vehicle or bicycle approaches from behind a parked vehicle at an angle

•

When a parked vehicle, wall, sign, person or other stationary object is behind the
vehicle

•

When an approaching vehicle or bicycle suddenly changes direction

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•

When an approaching vehicle or bicycle is traveling along a stationary object, such
a wall or sign

•

When the back door is open

•

When a bicycle carrier, ramp, or other accessory is installed to the back of the
vehicle

•

When a vehicle or bicycle is approaching at high speed

•

When towing with the vehicle

•

When stopped on a steep slope

•

When stopped on a curve or at the exit of a curve

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Buzzer and screen notifications when approaching an object at low
speed

*

Purpose of the intuitive parking assist

The distance from your vehicle to nearby obstacles when parallel parking or
maneuvering into a garage is measured by the sensors and communicated via the
displays and a buzzer. Always check the surrounding area when using this system.

WARNING

■

Cautions regarding the use of the system

There is a limit to the degree of recognition accuracy and control performance that this
system can provide, do not overly rely on this system. The driver is always responsible for
paying attention to the vehicle’ surroundings and driving safely.

■

To ensure the system can operate properly

Observe the following precautions. Failing to do so may result in the vehicle being unable
to be driven safely and possibly cause an accident.

●

Do not damage the sensors, and always keep them clean.

●

Do not attach a sticker or install an electronic component, such as a backlit license
plate (especially fluorescent type), fog lights, fender pole or wireless antenna near a
radar sensor.

●

Do not subject the surrounding area of the sensor to a strong impact. If subjected to
an impact, have the vehicle inspected by your Lexus dealer. If the front or rear bumper
needs to be emoved/installed or replaced, contact your Lexus dealer.

●

Do not modify, disassemble or paint the sensors.

●

Do not attach a license plate cover.

●

Keep your tires properly inflated.

■

When to disable the function

In the following situations, disable the function as it may operate even though there is no
possibility of a collision.

●

Failing to observe the warnings above.

●

A non-genuine Lexus suspension (lowered suspension, etc.) is installed.

INFORMATION

■

The intuitive parking assist can be operated when

●

The engine switch is in ON.

* : 

If equipped

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●

The intuitive parking assist is on.

●

The vehicle speed is less than about 6 mph (10 km/h).

●

A shift position other than P is selected.

■

Objects which the system may not be properly detected

The shape of the object may prevent the sensor from detecting it. Pay particular attention
to the following objects:

●

Wires, fences, ropes, etc.

●

Cotton, snow and other materials that absorb sound waves

●

Sharply-angled objects

●

Low objects

●

Tall objects with upper sections projecting outwards in the direction of your vehicle
People may not be detected if they are wearing certain types of clothing.

■

Situations in which the system may not operate properly

Certain vehicle conditions and the surrounding environment may affect the ability of a
sensor to correctly detect objects. Particular instances where this may occur are listed
below.

●

There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors will resolve
this problem.)

●

A sensor is frozen. (Thawing the area will resolve this problem.)
In especially cold weather, if a sensor is frozen the sensor display may be displayed
abnormally, or objects, such as a wall, may not be detected.

●

When a sensor or the area around a sensor is
extremely hot or cold.

●

On an extremely bumpy road, on an incline, on gravel, or on grass.

●

When vehicle horns, vehicle detectors, motorcycle engines, air brakes of large vehi-
cles, the clearance sonar of other vehicles or other devices which produce ultrasonic
waves are near the vehicle

●

A sensor is coated with a sheet of spray or heavy rain

●

If objects draw too close to the sensor.

●

When a pedestrian is wearing clothing that does not reflect ultrasonic waves (ex. skirts
with gathers or frills).

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●

When objects that are not perpendicular to the ground, not perpendicular to the
vehicle traveling direction, uneven, or waving are in the detection range.

●

When strong winds are blowing

●

When driving in inclement weather such as fog, snow or a sandstorm

●

When an object that cannot be detected is between the vehicle and a detected object

●

If an object such as a vehicle, motorcycle, bicycle or pedestrian cuts in front of the
vehicle or runs out from the side of the vehicle

●

If the orientation of a sensor has been changed due to a collision or other impact

●

When equipment that may obstruct a sensor is installed, such as a towing eyelet,
bumper protector (an additional trim strip, etc.), bicycle carrier, or snow plow

●

If the front of the vehicle is raised or lowered due to the carried load

●

If the vehicle cannot be driven in a stable manner, such as when the vehicle has been in
an accident or is malfunctioning

●

When a tire chains, compact spare tire or an emergency tire puncture repair kit is
used

■

Situations in which the system may operate even if there is no possibility of a
collision

In some situations, such as the following, the system may operate even though there is no
possibility of a collision.

●

When driving on a narrow road

●

When driving toward a banner, flag, low-hanging branch or boom barrier (such as
those used at railroad crossings, toll gates and parking lots)

●

When there is a rut or hole in the surface of the road

●

When driving on a metal cover (grating), such as those used for drainage ditches

●

When driving up or down a steep slope

●

If a sensor is hit by a large amount of water, such as when driving on a flooded road

●

There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors will resolve
this problem.)

●

A sensor is coated with a sheet of spray or heavy rain

●

When driving in inclement weather such as fog, snow or a sandstorm

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●

When strong winds are blowing

●

When vehicle horns, vehicle detectors, motorcycle engines, air brakes of large vehi-
cles, the clearance sonar of other vehicles or other devices which produce ultrasonic
waves are near the vehicle

●

If the front of the vehicle is raised or lowered due to the carried load

●

If the orientation of a sensor has been changed due to a collision or other impact

●

The vehicle is approaching a tall or curved curb

●

Driving close to columns (H-shaped steel beams, etc.) in multi-story parking garages,
construction sites, etc.

●

If the vehicle cannot be driven in a stable manner, such as when the vehicle has been in
an accident or is malfunctioning

●

On an extremely bumpy road, on an incline, on gravel, or on grass

●

When a tire chains, compact spare tire or an emergency tire puncture repair kit is
used

■

Certification

▶ 

For vehicles sold in the U.S.A.

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▶ 

For vehicles sold in Canada

Intuitive parking assist display

When an object is detected by a sensor, the following displays inform the driver of
the position and distance to the obstacle.

▶ 

Lexus parking assist monitor 

*

▶ 

Panoramic view monitor 

*

* : 

If equipped

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Position of the sensors of the Intuitive assist sensor

 

A

Front corner sensors

B

Front center sensors

C

Rear corner sensors

D

Rear center sensors

WARNING

■

Notes when washing the vehicle

Do not apply intensive bursts of water or steam to the sensor area.
Doing so may result in the sensor malfunctioning.

●

When using a high pressure washer to wash the vehicle, do not spray the sensors
directly, as doing so may cause a sensor to malfunction.

●

When using steam to clean the vehicle, do not direct steam too close to the sensors, as
doing so may cause a sensor to malfunction.

Turning the intuitive parking assist function ON/OFF

The intuitive parking assist can be enabled/disabled on the center display as
follows:

1

Select 

 .

2

Select [Driving assist].

3

Select [Intuitive parking assist] to change ON (enable)/OFF (disabled).

When ON (enable) is selected, the intuitive parking assist indicator comes on.
When turned OFF (disabled), the intuitive parking assist will be disabled and will not be
enabled until the setting is changed to ON again in center display.
(The system will not be reenabled by operating the engine switch.)

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Detection range of the intuitive parking assist

■

Detection range of the sensors  

 

A

Approximately 3.3 ft. (100 cm)

B

Approximately 4.9 ft. (150 cm)

C

Approximately 2.0 ft. (60 cm)

The diagram shows the detection range of the sensors.
Note that the sensors cannot detect objects that are extremely close to the vehicle.
The range of the sensors may change depending on the shape of the object, etc.  

INFORMATION

■

Sensor detection information  

●

The detection range of the sensors is limited to the areas around the vehicle’s bump-
ers.  

●

Certain vehicle conditions and the surrounding environment may affect the ability of a
sensor to correctly detect an object.

●

Objects may not be detected if they are too close to the sensor.

●

There is a short delay between when an object is detected and when the display and
buzzer operate. Even at slow speeds, there is a possibility that an object will come
within the detection range before the display is shown and the buzzer sounds.

●

It might be difficult to hear the buzzer due to the volume of the audio system or air flow
noise of the air conditioning system.

●

It may be difficult to hear the sound of this system due to the buzzers of other systems.

■

The distance and buzzer

Approximate distance to obstacle

Buzzer

Rear center sensor: Approximately 4.9 ft.
(150 cm) to 2.0 ft. (60 cm) 

(1)

Front center sensor: Approximately 3.3 ft.
(100 cm) to 2.0 ft. (60 cm) 

(1)

Slow

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Approximate distance to obstacle

Buzzer

Approximately 2.0 ft. (60 cm) to 1.5 ft. (45
cm) 

(1)

Medium

Approximately 1.5 ft. (45 cm) to 1.0 ft. (30
cm) 

(1)

Fast

Less than approximately 1.0 ft. (30 cm),
Less than approximately 0.5 ft. (15 cm) 

(1)

Continuous

(1)

Automatic buzzer mute function is enabled.

 

Intuitive parking assist buzzer operation and range

A buzzer sounds when objects are detected.

●

A buzzer sounds when the sensors are operating.

●

The buzzer beeps faster as thevehicle approaches an object. When the vehicle
comes within the approximately 1.0 ft. (30 cm) of the object, the buzzer will
sound continuously.

●

When 2 or more sensors simultaneously detect a static object, the buzzer
sounds for the nearest object.

●

Even when the sensors are operating, the buzzer will be muted in some situa-
tions. (automatic buzzer mute function)

Changing the intuitive parking assist buzzer volume

The buzzer volume can be adjusted on the center display.

1

Select 

.

2

Select [Driving assist].

3

Select [Collision mitigation].

4

Select [Parking assist volume].

Temporarily muting the intuitive parking assist buzzer

A mute button will be displayed on the center display when an object is detected.
To mute the buzzer, select 

.

To mute the buzzer, select 

. The buzzers for the intuitive parking assist sensor,

RCTA and RCD function will be muted simultaneously.
Mute will be canceled automatically in the following situations:

●

When the shift position is changed.

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●

When the vehicle speed exceeds a certain speed.

●

When there is a malfunction in a sensor or the system is temporarily unavailable.

●

When the operating function is disabled manually.

●

When the engine switch is turned off.

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